'\" te
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.TH DDI_INTR_GET_CAP 9F "Apr 20, 2005"
.SH NAME
ddi_intr_get_cap, ddi_intr_set_cap \- get or set interrupt capabilities for a
given interrupt type
.SH SYNOPSIS
.nf
#include <sys/types.h>
#include <sys/conf.h>
#include <sys/ddi.h>
#include <sys/sunddi.h>

\fBint\fR \fBddi_intr_get_cap\fR(\fBddi_intr_handle_t\fR \fIh\fR, \fBint *\fR\fIflagsp\fR);
.fi

.LP
.nf
\fBint\fR \fBddi_intr_set_cap\fR(\fBddi_intr_handle_t\fR \fIh\fR, \fBint\fR \fIflags\fR);
.fi

.SH INTERFACE LEVEL
illumos DDI specific (illumos DDI).
.SH PARAMETERS
\fBddi_intr_get_cap()\fR
.sp
.ne 2
.na
\fB\fIh\fR\fR
.ad
.RS 10n
DDI interrupt handle
.RE

.sp
.ne 2
.na
\fB\fIflagsp\fR\fR
.ad
.RS 10n
Pointer to the capability flags returned for this handle
.RE

.sp
.LP
\fBddi_intr_set_cap()\fR
.sp
.ne 2
.na
\fB\fIh\fR\fR
.ad
.RS 9n
DDI interrupt handle
.RE

.sp
.ne 2
.na
\fB\fIflags\fR\fR
.ad
.RS 9n
Contains the capability flag to be set
.RE

.SH DESCRIPTION
The \fBddi_intr_get_cap()\fR function returns the interrupt capability flags
for the interrupt handle \fIh\fR. Upon a successful return, the flags are
returned in the integer pointed to by the \fIflagsp\fR argument.
.sp
.LP
These flags are typically combinations of the following:
.sp
.ne 2
.na
\fB\fBDDI_INTR_FLAG_EDGE\fR\fR
.ad
.RS 26n
For discrete interrupts, the host supports \fBedge\fR type of trigger. This
flag is not returned for \fBDDI_INTR_TYPE_MSI\fR or \fBDDI_INTR_TYPE_MSIX\fR
interrupt types. This is a read-write (RW) flag.
.RE

.sp
.ne 2
.na
\fB\fBDDI_INTR_FLAG_LEVEL\fR\fR
.ad
.RS 26n
For discrete interrupts the host supports \fBlevel\fR, \fBedge\fR, or both
types of triggers. This flag is not returned for \fBDDI_INTR_TYPE_MSI\fR or
\fBDDI_INTR_TYPE_MSIX\fR interrupt types.
.RE

.sp
.ne 2
.na
\fB\fBDDI_INTR_FLAG_MASKABLE\fR\fR
.ad
.RS 26n
The interrupt can be masked either by the device or by the host bridge, or
optionally by the host. This is a read-only (\fBRO\fR) flag.
.RE

.sp
.ne 2
.na
\fB\fBDDI_INTR_FLAG_PENDING\fR\fR
.ad
.RS 26n
The interrupt supports an interrupt pending bit. This is a read-only (\fBRO\fR)
flag.
.RE

.sp
.ne 2
.na
\fB\fBDDI_INTR_FLAG_BLOCK\fR\fR
.ad
.RS 26n
All interrupts of the given type must be block-enabled and are not individually
maskable. This is a read-only (\fBRO\fR) flag.
.RE

.sp
.LP
The \fBddi_intr_set_cap()\fR function allows a driver to specify the capability
flags for the interrupt handle \fIh\fR. Only \fBDDI_INTR_FLAG_LEVEL\fR and
\fBDDI_INTR_FLAG_EDGE\fR flags can be set. Some devices can support both level
and edge capability and either can be set by using the \fBddi_intr_set_cap()\fR
function. Setting the capability flags is device and platform dependent.
.sp
.LP
The \fBddi_intr_set_cap()\fR function can be called after interrupts are
allocated and prior to adding the interrupt handler. For all other times it
returns failure.
.SH RETURN VALUES
The \fBddi_intr_get_cap()\fR and \fBddi_intr_set_cap()\fR functions return:
.sp
.ne 2
.na
\fB\fBDDI_SUCCESS\fR\fR
.ad
.RS 15n
On success.
.RE

.sp
.ne 2
.na
\fB\fBDDI_EINVAL\fR\fR
.ad
.RS 15n
On encountering invalid input parameters.
.RE

.sp
.ne 2
.na
\fB\fBDDI_FAILURE\fR\fR
.ad
.RS 15n
On any implementation specific failure.
.RE

.sp
.ne 2
.na
\fB\fBDDI_ENOTSUP\fR\fR
.ad
.RS 15n
On device not supporting operation.
.RE

.SH CONTEXT
The \fBddi_intr_get_cap()\fR and \fBddi_intr_set_cap()\fR functions can be
called from either user or kernel non-interrupt context.
.SH ATTRIBUTES
See \fBattributes\fR(7) for descriptions of the following attributes:
.sp

.sp
.TS
box;
c | c
l | l .
ATTRIBUTE TYPE	ATTRIBUTE VALUE
_
Interface Stability	Committed
.TE

.SH SEE ALSO
.BR attributes (7),
.BR ddi_intr_alloc (9F),
.BR ddi_intr_block_enable (9F),
.BR ddi_intr_get_nintrs (9F),
.BR ddi_intr_get_pending (9F),
.BR ddi_intr_get_supported_types (9F),
.BR ddi_intr_set_mask (9F)
.sp
.LP
\fIWriting Device Drivers\fR
.SH NOTES
Consumers of these interfaces should verify that the return value is not equal
to \fBDDI_SUCCESS\fR. Incomplete checking for failure codes could result in
inconsistent behavior among platforms.
